Dehant, V., Laguerre, R., Rekier, J., Rivoldini, A., Andres Triana, S., Trinh, A., Van Hoolst, T., & Zhu, P. (2017). Understanding the effects of the core on the nutation of the Earth. Geodesy and Geodynamics, 8, 389-395. https://doi.org/10.1016/j.geog.2017.04.005 (Original work published 2017)